求教一道简单的大学数学题,英文的!! 50
Aresearcherwishestotesttheclaimthattheaverageageoflifeguardsisgreaterthan24years.Ther...
A researcher wishes to test the claim that the average age of lifeguards is greaterthan 24 years. The researcher sampled 36lifeguards and found an average of 24.7 years with a known population standarddeviation of 2 years. Test the claim at the 0.05 significance level. Use the P-value method.
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